Warnings while backingup first time.

Respected forum members,

i am new to wordpress.
i was backing up y wordpress b using BackWPup.
And while creating back, it shows these errors.

[INFO] BackWPup 3.3.4; A project of Inpsyde GmbH
[INFO] WordPress 4.7 on https://enp.000webhostapp.com/
[INFO] Log Level: Normal
[INFO] BackWPup job: back up 1
[INFO] Logfile is: backwpup_log_a3afd9_2016-12-22_15-52-51.html
[INFO] Backup file is: backwpup_a3afd9_2016-12-22_15-52-51.zip
[22-Dec-2016 15:52:53] WARNING: mysqli_query(): MySQL server has gone away
[22-Dec-2016 15:52:54] WARNING: mysqli_query(): Error reading result set’s header
[22-Dec-2016 15:52:54] ERROR: Step aborted: too many attempts!
[22-Dec-2016 15:52:55] 1. Trying to make a list of folders to back up …
[22-Dec-2016 15:52:56] Added “wp-config.php” to backup file list
[22-Dec-2016 15:52:56] 538 folders to backup.
[22-Dec-2016 15:52:56] 1. Trying to generate a file with installed plugin names …
[22-Dec-2016 15:52:56] Added plugin list file “Exploring-New-Perspectives.pluginlist.2016-12-22.txt” with 1.80 KB to backup file list.
[22-Dec-2016 15:52:56] 1. Trying to generate a manifest file …
[22-Dec-2016 15:52:56] Added manifest.json file with 4.42 KB to backup file list.
[22-Dec-2016 15:52:56] 1. Trying to create backup archive …
[22-Dec-2016 15:52:56] Compressing files as ZipArchive. Please be patient, this may take a moment.
[22-Dec-2016 15:53:08] WARNING: mysqli_ping(): MySQL server has gone away
[22-Dec-2016 15:54:04] WARNING: mysqli_ping(): MySQL server has gone away
[22-Dec-2016 15:54:07] WARNING: mysqli_ping(): MySQL server has gone away
[22-Dec-2016 15:54:16] WARNING: mysqli_ping(): MySQL server has gone away
[22-Dec-2016 15:54:19] WARNING: mysqli_ping(): MySQL server has gone away
[22-Dec-2016 15:55:03] WARNING: mysqli_ping(): MySQL server has gone away
[22-Dec-2016 15:55:45] WARNING: mysqli_ping(): MySQL server has gone away
[22-Dec-2016 15:55:47] WARNING: mysqli_ping(): MySQL server has gone away
[22-Dec-2016 15:55:50] WARNING: mysqli_ping(): MySQL server has gone away
[22-Dec-2016 15:56:03] WARNING: mysqli_ping(): MySQL server has gone away
[22-Dec-2016 15:57:03] WARNING: mysqli_ping(): MySQL server has gone away
[22-Dec-2016 15:58:02] WARNING: mysqli_ping(): MySQL server has gone away
[22-Dec-2016 15:59:03] WARNING: mysqli_query(): MySQL server has gone away
[22-Dec-2016 15:59:03] WARNING: mysqli_query(): Error reading result set’s header
[22-Dec-2016 15:59:04] ERROR: Step aborted: too many attempts!
[22-Dec-2016 15:59:04] ERROR: Job has ended with errors in 373 seconds. You must resolve the errors for correct execution.

Pl tell me what this is all about.